Lubricating gun



May l5, 1928.

F. W. PARKER LUBRICATING GUN Filed Maron 4, 1927 n, sa

K fir.. a if? sgml ATTORNEY Patented May 15, 1928.

UNITED STATES FRANK WESLEY PARKER, F BOISE, IDAHO.

LUBRICATING GUN.

application mea laren-4, 1927. serial No. 172,863.

The lubricating gun of the present invention ma have a wide and varied range of utility, utis primarily intended for dispensing liquid greases as opposed to the relatively heavier pasty lubricants handled by other devices now on the market.

I have discovered that various high quality oils and greases recommended by motor car manufacturers are used but infrequently due primarily to the absence of any suitable type of gun for applying them. In accordance with the present invention I have provided a gun which will handle this type of grease and into which the greases may be poured, filling the gun being a very simple operation.

An object of the invention is to provide a gun of this character so constructed that a powerful thrust of the lubricant ejecting piston is obtained rapidly and easily by a rack and pinion movement.

Further objects of the invention are tov provide a gun which will be comparatively light in weight, yet rugged and durable in v use, capable of being readily lled and discharged, and well suited to the requirements of economical manufacture.

With the above noted and other objects in view, the invention consists in certain novel features of construction and com-v binations and arrangements of parts as will \be more fully hereinafter set forth and pointed out in the claims. The invention may be more fully understood from the following description in connection with the accompanying drawings, wherein- Figure 1 is a view mainly in longitudinal section and partly in elevation througha lubricating gun embodying the present invention.

Figure 2 is a transverse sectional view on the line 2-2 of Figure 1.

Figure 3 is a side elevational view of the nozzle end closure.

numeral 10 to designate the barrel of the gun, this barrel being preferably cylindrical m shape and formed from relatively thin tube stock. A feature 'of the invention is the manner in which the closures are mounted at the two ends of the barrel. At the nozzle, end, the barrel stock is spun outwardly defining a retaining lip 11 for a ring: 12, snugly fitting the barrel, and carry- 'ng a pair of screw studs 13, the inner ends 4 of which project inwardly into the barrel versely extendin In the drawings I have used the reference and coacting with cam grooves 15 in a clov sure block 16 ilanged as at 17 to seat on the ring 12 when the block is screwed home. Handle pieces 18 preferably integral with the block casting 16 facilitate the manual application or removal of the block or cap 16, and the cap carries a nozzle 19 of any desired formation, the nozzle being screwed into the cap.

At the op osite end of the cylinder an externally tlilreaded ring 2O is retained against longitudinal displacement on the cylinder by spinning over a lip 21 to Hare the cylinder end. Screwed on to the ring 20 is a flanged cap portion 22 of a casting 23. This casting includes a rearwardly extending sleeve portion 24 delining a bearing for the piston rod 25, and also includes a transbearing sleeve portion 26 in which a spin leV 27 is borne.

Movement of the piston rod in one direction is limited by the engagement of a piston 28 with the casting at the handle'end of the barrel, and movement in the other direction is limited by a stop disc 29 carried by the piston rod. y

A pistol' grip handle portion 30 preferably integral with the casting 23 is adapted to be held in the left hand of an operator while the spindle 27 isprotated by a suitable crank handle 31. The spindle 27 is provided with a toothed portion 32 meshing with rack teeth 33 on the piston rod. Preferably the spindle 27 is retained against axial movement in its sleeve '26 by a nut 34 screwed on to its reduced -threaded end 35 and clamping a washer 36 against one end of the sleeve 26. Abutting the other end of the sleeve and integral or rigid with the spindle 27 is a member 37 constituting an enlargement of the spindle and having a reduced externally threaded outer end 38 intersected by a transverse slot 39 into which the crank handle 31 may be laid and retained in any position of adjustment by a nut 40 screwed on to the extension 38. In locations where there is not sufficient room 'to work the crank handle 31 nut 4:0 is loosened and the crank handle 31 is laid aside.

. The nut 40 is then screwed forward to the extreme position upon the threaded outer end 38 whereupon the spindle 27 may be turned by the radiall projecting finger pieces 42 screwed into tlie nut 40, which nut and finger pieces become the operating eapstan for the spindle 27. It is observed in Figure 2 that the enlargement 37 of the spindle 27 has a hole 41 into which asuitable implement is .inserted so that the spindle magl be held against turnin when loosening t e nut 40. prior to restoring the handle 31 to its former operative position.

rlhe above described construction permits speedy and yet powerful thrust of the lubricant dispensing piston 28. When filling the gun, the piston is retracted, the ca 16 manually removed and liquid lubricant poured into the o n mouth of the gun upon the piston. he cap is then replaced and the device is read for operation. If desired, the piston ro may be graduated as indicated to designate the amount f lubricant which is poured into, or which has been dispensed from the barrel. The use o f the relatively 1i ht shell as the barrel member is made possile b the novel manner of attaching and firm y anchoring the rings 12 and 20 by the spun-over barrel ends..

Obvious] various changes and alterations mig it bemade in the general form and arrangement of parts described without departing from the invention. Hence I do not wish to limit myself to the details set forth, but shall consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the ap- A pended claims.

I claim:

-1.- A lubricating gun including a cylindrical shell constituting a barrel, rin s encirclin the shell at each end, the en s of the shel being spun outwardl to retain the rings, a nozzle, a piston sli ing in the barrel, and a piston rod, a closure anchored to one ring providing a bearing for the piston.

red, and a closure anchored to the other ring and carrying the nozzle, the nozzle carrying closure comprising a plug having cam grooves therein, studs projecting inwardly from the associated ring coacting with the grooves to Secure the plug.

2. A lubricating gun including a cylindrical shellconstituting a barrel, rings encircling the shell at each end, the ends of the shell being spun outwardly to retain` the rings, aA nozzle, a piston sliding in the-barrel, and a piston rod, a closure anchored to one ring providing a bearing for the piston rod,' and a closure anchored to the other ring and carrying the nozzle, the nozzle carrying closure comprising aplug having cam grooves therein, studs 4projecting inwardly from the associated ring coacting with the grooves to secure the plug, the plug being flanged to overlie the flush end faces of the ring and shell. y

3. A device of the character described comprising abarrel, a piston Working therein, a rack-toothed rod connected to the piston, a spindle having teeth engaging the teeth of the rod, an independent crank handle for turning the spindle, and means for clamping the crank handle upon the spindle at various positions of radial adjustment,y

said means comprising a nut with finger pieces serving the purpose of a capstan tor turning the splndle upon prior removalof the crank handle when operating in close quarters.

4. A device of the character described comprising a barrel, a piston Working therein, a rack-toothed rod fior-reciprocating the piston and the barrel, a spindle having teeth engaging the teeth of the rod, said spindle `threaded end having an enlargement and a slot in said threaded end extending part-way into said enlargement, a crank handle applied in the slot, and means screwed upon said threaded end clamping the crank handle in position against the baseV of the slot, said enlargement then providing an extended area for the application of pressure of the crank handle.

\ 6. In a device of thecharacter dcseril'ied including va barrel, a piston reciprocahle therein, a spindle journalled in the barrel and operatively engaging the piston to reciprocate the same and having a bifurcated threaded end, `a crank handle adjustable between the bifurcated parts of the spindle, and a .threaded element engaged on the threaded end to-clamp the bifurcated parts into binding engagementwith the crank handle.

FRANK WESLEY PiRKER. 

